Metadata Example for 2012 Hoh

Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Data_Organization_Information
• Spatial_Reference_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: WSI

Title: q47124e31be

Geospatial_Data_Presentation_Form: raster digital data

Description:

Abstract:

This dataset represents portions of the Hoh Watershed in Jefferson County, WA. This bare earth digital elevation model (DEM) represent the earth's surface with all vegetation and human-made structures removed. The bare earth DEMs were derived from LiDAR data using TIN processing of the ground point returns. The DEM grid cell size is 3 feet. The elevation units are in US survey feet. Some elevation values have been interpolated across areas in the ground model where there is no elevation data (e.g. over water, under dense vegetation). WSI collected the LiDAR and created this data set for the Puget Sound LiDAR Consortium and the Hoh Tribal Natural Resources on April 14th, 15th, 17th, 19th, 20th, and 21st, 2012.

Purpose:

Provide high resolution terrain elevation and land cover elevation data.

Supplemental_Information:

This data is assembled by 1/4th USGS Quads and projected into Washington State Plane South, FIPS 4602, US Survey Feet.

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -124.376460

East_Bounding_Coordinate: -124.310119

North_Bounding_Coordinate: 47.627053

South_Bounding_Coordinate: 47.589933

Keywords:

Theme:

Theme_Keyword_Thesaurus: None

Theme_Keyword: elevation data

Theme_Keyword: digital terrain model

Theme_Keyword: DEM

Theme_Keyword: bare ground

Theme_Keyword: topography

Theme_Keyword: Hoh Watershed

Theme_Keyword: LiDAR

Theme_Keyword: Puget Sound LiDAR Consortium

Theme_Keyword: Light Detection and Ranging

Theme_Keyword: DTM

Theme_Keyword: bare earth

Theme_Keyword: high-resolution

Place:

Place_Keyword_Thesaurus: None

Place_Keyword: Pacific Northwest

Place_Keyword: Washington

Place_Keyword: Hoh Watershed

Access_Constraints: None

Use_Constraints:

In some areas of heavy vegetation or forest cover, there may be relatively few ground points in the LiDAR data. TINing the points produces large triangles and hence the elevations may be less accurate within such areas. Elevation values for open water surfaces are not valid elevation values because few LiDAR points are returned from water surfaces. Triangles were created across water surfaces by interpolating from the nearest land points.

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: WSI

Contact_Address:

Address_Type: mailing and physical

Address: 517 SW 2nd Ave., Suite 400

City: Corvallis

State_or_Province: OR

Postal_Code: 97333

Contact_Voice_Telephone: 541-752-1204

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Puget Sound LiDAR Consortium

Contact_Person: Diana Martinez

Contact_Address:

Address_Type: mailing

Address: 1011 Western Ave., Suite 500

City: Seattle

State_or_Province: Washington

Postal_Code: 98104

Contact_Electronic_Mail_Address: dmartinez@psrc.org

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Hoh Tribal Natural Resources

Contact_Person: Steve Allison

Contact_Address:

Address_Type: mailing

Address: 2483 Lower Hoh Road

City: Forks

State_or_Province: WA

Postal_Code: 98331

Contact_Electronic_Mail_Address: stallison2000@yahoo.org

Data_Set_Credit:

Diana Martinez, Puget Sound LiDAR Consortium Hoh Tribal Natural Resources WSI

Native_Data_Set_Environment:

Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; ESRI ArcGIS 10.0.3.3600

Data_Quality_Information:

Logical_Consistency_Report:

LiDAR flight lines have been examined to ensure that there was at least 60% sidelap, there are no gaps between flightlines, and overlapping flightlines have consistent elevation values. Shaded relief images have been visually inspected for data errors such as pits, border artifacts, gaps, and shifting. The data was examined at a 1:2000 scale.

Completeness_Report:

LiDAR data has been collected and processed for all areas within the project study area.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Quantitative_Horizontal_Positional_Accuracy_Assessment:

Horizontal_Positional_Accuracy_Explanation: See LiDAR data report.

Positional_Accuracy:

Vertical_Positional_Accuracy:

Quantitative_Vertical_Positional_Accuracy_Assessment:

Vertical_Positional_Accuracy_Value: RMSE = 0.031 meters (0.102 feet)

Vertical_Positional_Accuracy_Explanation:

The Root Mean Square Error (RMSE) of the data set is 0.031 meters (0.102 feet). Accuracy was assessed using 2,114 ground survey RTK (real time kinematic) points. Please see LiDAR data report for a discussion of statistics related to these datasets.

Lineage:

Process_Step:

Process_Description:

Acquisition. The LiDAR data was collected between April 14th, 15th, 17th, 19th, 20th, and 21st, 2012.. The survey used a Leica ALS60 and Leica ALS50 Phase II laser system mounted in a Cessna Caravan 208B. Data was collected using a single pulse (SPiA) flight plan. Near nadir scan angles were used to increase penetration of vegetation to ground surfaces. Ground level GPS and aircraft IMU were collected during the flight. Leica ALS 60 Instrument Parameters; Beam diameter: 21 cm, Pulse rate: 105 kHz, Maximum returns: 4, Minimum separation between returns: 3.5 m, Laser output power: 17% Minimum return power: 200 kHz, Beam wavelenth: 1064 nm, Frequency of GPS sampling: 2 Hz, Frequency of IMU sampling: 200 Hz, Swath width: 448 m AGL: 900 m Single swath pulse density: 4 Average pulse density: 8
Leica ALS 50 Phase II Instrument Parameters; Beam diameter: 21 cm, Pulse rate: 105 kHz, Maximum returns: 4, Minimum separation between returns: 3.5 m, Laser output power: 17% Minimum return power: 200 kHz, Beam wavelenth: 1064 nm, Frequency of GPS sampling: 2 Hz, Frequency of IMU sampling: 200 Hz, Swath width: 448 m AGL: 900 m Single swath pulse density: 4 Average pulse density: 8

Process_Step:

Process_Description:

Processing. 1. Flight lines and data were reviewed to ensure complete coverage of the study area and positional accuracy of the laser points. 2. Laser point return coordinates were computed using ALS Post Processor software, IPAS Pro GPS/INS software, and Waypoint GPS, based on independent data from the LiDAR system, IMU, and aircraft. 3. The raw LiDAR file was assembled into flight lines per return with each point having an associated x, y, and z coordinate. 4. Visual inspection of swath to swath laser point consistencies within the study area were used to perform manual refinements of system alignment. 5. Custom algorithms were designed to evaluate points between adjacent flight lines. Automated system alignment was computed based upon randomly selected swath to swath accuracy measurements that consider elevation, slope, and intensities. Specifically, refinement in the combination of system pitch, roll and yaw offset parameters optimize internal consistency. 6. Noise (e.g., pits and birds) was filtered using ALS postprocessing software, based on known elevation ranges and included the removal of any cycle slips. 7. Using TerraScan and Microstation, ground classifications utilized custom settings appropriate to the study area. 8. The corrected and filtered return points were compared to the RTK ground survey points collected to verify the vertical and horizontal accuracies. 9. Points were output as laser points, TINed and GRIDed surfaces.

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Raster

Raster_Object_Information:

Raster_Object_Type: Pixel

Row_Count: 4263

Column_Count: 5254

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Map_Projection:

Map_Projection_Name: NAD 1983 HARN StatePlane Washington South FIPS 4602 Feet

Lambert_Conformal_Conic:

Standard_Parallel: 45.83333333333334

Standard_Parallel: 47.33333333333334

Longitude_of_Central_Meridian: -120.5

Latitude_of_Projection_Origin: 45.33333333333334

False_Easting: 1640416.666666667

False_Northing: 0.0

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: coordinate pair

Coordinate_Representation:

Abscissa_Resolution: 0.000000026454105572781834

Ordinate_Resolution: 0.000000026454105572781834

Planar_Distance_Units: Foot_US

Geodetic_Model:

Horizontal_Datum_Name: D North American 1983 HARN

Ellipsoid_Name: GRS 1980

Semi-major_Axis: 6378137.0

Denominator_of_Flattening_Ratio: 298.257222101

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Puget Sound LiDAR Consortium

Contact_Person: Diana Martinez

Contact_Address:

Address_Type: mailing

Address: 1011 Western Avenue, Suite 500

City: Seattle

State_or_Province: WA

Postal_Code: 98104

Contact_Voice_Telephone: 206-971-3052

Contact_Electronic_Mail_Address: dmartinez@psrc.org

Distribution_Liability: See access and use constraints information.

Metadata_Reference_Information:

Metadata_Date: 20120824

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: WSI

Contact_Address:

Address_Type: mailing and physical

Address: 517 SW 2nd Ave., Suite 400

City: Corvallis

State_or_Province: OR

Postal_Code: 97333

Contact_Voice_Telephone: 541-752-1204

Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998

Metadata_Time_Convention: local time